激光技术Issue(3)：419-422,4.DOI:10.7510/jgjs.issn.1001-3806.2015.03.030
基于图像功率谱的激光散斑评价方法
Laser speckle evaluation methods based on power spectrum of images
摘要
Abstract
Laser speckle has important applications in many areas , such as optical coherence tomography , holography , multimode optical fiber communication and metrology .In order to evaluate the laser speckle , the power spectrum width of speckle image in frequency domain was proposed as the evaluation method of laser speckle .The experiment device of power spectrum speckle evaluation was designed based on optical fiber vibration .A 0.5W, 532nm laser was used as light source and a voltage-driven voice coil motor was used to vibrate the fiber and control laser speckle . A CCD image acquisition card was used to collect images .Speckle contrast method and power spectrum method were respectively used to evaluate the speckle images under different driving voltages .The results show that the method of power spectrum has higher sensitivity and wider range of evaluation .关键词
激光光学/激光散斑/功率谱/谱宽/散斑对比度/频域Key words
laser optics/laser speckle/power spectrum/spectral width/speckle contrast/frequency domain分类
信息技术与安全科学引用本文复制引用
曹金凤,贺锋涛..基于图像功率谱的激光散斑评价方法[J].激光技术,2015,(3):419-422,4.基金项目
国家自然科学基金资助项目 （）
